| Class | Description | 
|---|---|
| AlignmentPattern | Encapsulates an alignment pattern, which are the smaller square patterns found in
 all but the simplest QR Codes. | 
| Detector | Encapsulates logic that can detect a QR Code in an image, even if the QR Code
 is rotated or skewed, or partially obscured. | 
| FinderPattern | Encapsulates a finder pattern, which are the three square patterns found in
 the corners of QR Codes. | 
| FinderPatternFinder | This class attempts to find finder patterns in a QR Code. | 
| FinderPatternInfo | Encapsulates information about finder patterns in an image, including the location of
 the three finder patterns, and their estimated module size. | 
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